KR100826826B1 - Home network system using bluetooth and method thereof - Google Patents

Abstract

A home network system using Bluetooth and a method therefor are provided to calculate a transmissible transmission rate of a Bluetooth communication channel, and to control the transmission capacity of a video signal according to the calculated transmission rate, thereby avoiding excessive traffic on the communication channel. A home network controller(200) comprises as follows. A Bluetooth unit(260) enables data communication with a wireless controller by using an RF(Radio Frequency). A transmission rate calculator(270) monitors a traffic state of a communication channel between the wireless controller and the Bluetooth unit, and calculates a transmission rate. A video signal processor(220) controls transmission capacities of a video signal transmitted from a remote controller apparatus, so that the video signal has transmission capacities suitable for the calculated data transmission rate.

Description

Home network system using Bluetooth and its method {Home network system using bluetooth and method

1 is a schematic diagram showing a home network system using Bluetooth according to a preferred embodiment of the present invention;

2 is a block diagram illustrating a home network controller in the home network system of FIG. 1;

3 is a view illustrating an operation of a frame editing module of an image signal processor in the home network controller of FIG. 1;

4 is a view illustrating operations of a change image detection module and a background image detection module of an image signal processor in the home network controller of FIG. 3;

5 is a block diagram illustrating a radio controller in the home network system of FIG. 1; And

6 is a control flowchart illustrating the operation of a home network system using Bluetooth according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: remote control device 200: home network controller

210: audio signal processor 220: video signal processor

230: detection signal processing unit 240: external input signal processing unit

250: control signal generation unit 260: Bluetooth unit

270: transmission rate calculation unit 300: control terminal

310: audio signal processor 320: video signal processor

330: detection signal processing unit 340: external input signal processing unit

350: Bluetooth unit

The present invention relates to a home network system and a method thereof, and more particularly, to a home network controller connected to various remote control devices in a home, and to a wireless controller capable of Bluetooth communication with the home network controller. The present invention relates to a home network system and a method using Bluetooth that can prevent transmission delay occurring during transmission and reception, thereby enabling better transmission and reception of video, audio, and control data, and reducing power loss.

In general, a home network system for automatically controlling home appliances in each home is approaching a commercialization stage.

However, in the conventional home network systems, home network devices are connected to enable data communication with remote control devices such as entrances, common entrances, interphones, telephones, home appliances, gas valves, and fire detectors. It is configured to remotely control the remote control devices through the home network device through a communication network such as.

Therefore, in order to control the remote control devices in the home, not the remote place, the user had to move to the place where the target remote control device to be directly controlled. For example, when a call is made from an outside entrance, a common entrance, a guard room, another household, or a trunk line, the call can be made only when the remote control device to which the call target is installed is installed, and when the user is in bed, more inconvenience is caused. In addition, when the remote control device, for example, the call target is installed in a high place, a small child, an uncomfortable patient, or a disabled person may not use the interphone.

Therefore, a home network system has been disclosed that enables data communication in all directions without space limitation by using Bluetooth, which enables data communication wirelessly without a physical cable for communication between various electronic devices.

However, the maximum data transfer rate of Bluetooth used in the conventional home network system is about 1 Mbps (actually 723 kbps).

Therefore, excessive traffic occurs in the 2.4 GHz Industrial Scientific Medical (ISM) band, which is used when continuously transmitting video or large video data using Bluetooth. There is a problem that data is lost due to a crash.

In addition, if the transmission and reception of data is delayed or lost as described above, error correction or data retransmission process through the normal transmission error control method should be performed. Inquiry) and data transfer (Active) takes longer, resulting in an increase in power loss (30 mA (0.3 mA standby)).

Accordingly, an object of the present invention is to provide a home network system and a method using a Bluetooth that can reduce the transmission capacity of the video data so that excessive traffic is not generated when transmitting and receiving video data continuously generated.

In addition, another object of the present invention is to provide a home network system and a method using a Bluetooth that can reduce the power loss according to transmission and reception of the image data and the transmission error control method.

According to the present invention, there is provided a home network system including a remote controller, a home network controller connected to the remote controller for data communication, and a wireless controller capable of mutual Bluetooth communication with the home network controller. A Bluetooth unit for enabling data communication with the radio controller using an RF; A transmission rate calculating unit for monitoring a traffic state of a communication channel between the radio controller and the Bluetooth unit and calculating a data transmission rate; And a video signal processing unit for controlling the transmission capacity of the video signal transmitted from the remote controller so as to have a transmission capacity suitable for the calculated data transmission speed.

In addition, the transmission rate calculating unit communicates through the transmission amount (Tr) of the data currently being transmitted on the communication channel between the Bluetooth unit and the radio controller, the initial transmission time (St) and the current time (Nt) of the data being transmitted. It is desirable to calculate the highest or lowest data rate over the channel (Bit per rate: Bit per rate = (Tr / (Nt-St)).

In addition, the image signal processing unit frame editing for storing the edited image consisting of some of the most clear image frame of the frame number of the video signal so that the image signal has a transmission capacity suitable for the highest transmission rate or the lowest transmission rate It is preferable to include a module.

In addition, the video signal processing unit sequentially compares frames per second of the video signal to each other so that the video signal has a transmission capacity smaller than the transmission capacity suitable for the lowest transmission speed, and examines the entire region of the frame. It is preferable to further include a change image detection module for storing the change image extracted from the bay at a certain number of frames.

The image signal processor may further include a background image detection module configured to store an unchanged region among the frames detected by the change image detection module as a background image of one frame.

In addition, the frame number is preferably determined according to the formula for calculating the transmission capacity per second of the video signal.

In addition, the radio controller includes a Bluetooth unit for enabling data communication with the home network controller using radio frequency (RF); And a video signal processor configured to process and display a video signal transmitted from a home network controller through the Bluetooth unit. The video signal processor includes a background image transmitted from a background image detection module to a change image transmitted from the changed image detection module. It is preferable to include an image overlap module to capture or overlap (Over-rap) in the frame.

On the other hand, according to the present invention, in the home network method comprising a remote controller, a home network controller connected to the remote control device for data communication and a wireless controller capable of mutual Bluetooth communication with the home network controller, the home network controller, A Bluetooth unit for enabling data communication with the radio controller using radio frequency (RF); A transmission rate calculation unit calculating a traffic state and a data transmission rate of a communication channel between the radio controller and the Bluetooth unit; And a video signal processing unit for controlling a transmission capacity of an image signal transmitted from the remote controller so as to have a transmission capacity suitable for the calculated data transmission rate, wherein the radio controller uses the radio frequency (RF) to perform the transmission. A Bluetooth unit for enabling data communication with the home network controller; And a video signal processing unit for processing and displaying the video signal transmitted from the home network controller through the Bluetooth unit, wherein the communication speed between the Bluetooth unit and the Bluetooth unit of the wireless controller is controlled by the transmission rate calculating unit of the home network controller. A first step of calculating a highest or lowest data rate; A second step of adjusting a transmission capacity of the video signal transmitted from the remote control device by the image signal processing unit of the home network controller to have a value smaller than a transmission capacity suitable for the calculated maximum or minimum data transmission rate; A third step of transmitting the image signal to the Bluetooth unit of the wireless controller by the Bluetooth unit of the home network controller; And a fourth step in which the image signal is processed and displayed by the image processor of the wireless controller.

In addition, a fifth step in which the data transmission rate of the video signal being transmitted is compared with the lowest data transmission rate calculated by the transmission rate calculation unit by the transmission rate calculation unit of the home network controller at the same time as the third step. It is preferable to include.

In addition, when the data transmission rate of the video signal being transmitted is lower than the minimum data transmission rate in the fifth step, the change image extracting only a change region of frames per second of the video signal by the image signal processor of the home network controller. The method may further include a sixth step of storing the image as a change image having a predetermined number of frames.

The method may further include a seventh step after the sixth step, extracting an unchanged area of the frames per second of the video signal and storing the same as a background image of one frame.

In addition, the change image is captured or overlapped with the background image by the radio controller.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and effect of the preferred embodiment of the present invention.

In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a block diagram schematically showing a home network system using Bluetooth according to a preferred embodiment of the present invention, Figure 2 is a block diagram showing a home network controller in the home network system of FIG.

As shown in FIG. 1, a home network system using Bluetooth according to a preferred embodiment of the present invention includes a remote control device 100, a home network controller 200 connected to the remote control device 100 to enable data communication, and It includes a wireless controller 300 capable of mutual Bluetooth communication with the home network controller 200.

The remote control device 100 is a control target device including a camera, a bell, a voice call, a digital door lock, or the like installed in a front door or a common door, and includes an outdoor unit 110, an outdoor unit 110, a guard room, and another household. And voice call device 120 such as an interphone or telephone connected to an internal trunk line for communication with the outside, home appliances 130 such as TV, audio and refrigerator, and security security sensor, fire detection sensor, gas leak detection sensor, and various switches. Detection sensor 140 such as an operation sensor or the like.

As shown in FIG. 2, the home network controller 200 is connected to the remote controller 100 to enable data communication, and a voice signal processor for processing a voice signal of the remote controller 100. (210), the image signal processing unit 220 for processing the image signal of the remote control device 100, the sensing processor 230 for processing the detection signal of the remote control device 100, the remote control device 100 By using an external input signal processor 240 for processing an infrared signal of the remote controller, a control signal generator 250 for generating a control signal for controlling the remote controller 100, and a radio frequency (RF) Bluetooth unit 260 for enabling data communication with the radio controller 300, transmission rate calculation unit 270 for calculating the communication channel traffic state and data transmission rate between the radio controller 300 and Bluetooth unit 260 And audio signal processing unit 210, a video signal destination The components 220 are electrically connected to the sensing unit 220, the sensing signal processor 230, the external input signal processor 240, the control signal generator 250, the Bluetooth unit 260, and the transmission rate calculator 270. A control unit 280 for controlling.

The voice signal processor 210 modulates and demodulates a voice signal received from an internal trunk line to which the outdoor unit 110 and the voice call device 120 of the remote controller 100 are connected, and outputs the same through a speaker 201. The voice signal received from 202 is modulated and demodulated and transmitted to the outdoor unit 110 and the voice call device 120 of the remote controller 100 to enable voice call.

3 is a diagram illustrating an operation of a frame editing module of an image signal processing unit in the home network controller of FIG. 1.

The video signal processor 220 encodes / decodes the video signal of the outdoor unit 110 of the remote controller 100 to display the video signal through the LCD 203.

In addition, the video signal processing unit 220, when transmitting the video signal of the outdoor unit 110 to the wireless controller 300 through the Bluetooth unit 260 due to the large amount of video signal taken in real time excessive traffic to the communication channel The transmission capacity of the video signal is controlled so as not to occur.

To this end, the image signal processing unit 220, as shown in Figure 3, the video signal has a transmission capacity suitable for the maximum data transmission speed of the current state of the communication channel calculated by the transmission rate calculation unit 270 The frame editing module 221 stores an edited image composed of some frames having the sharpest image among the frames per second of the video signal (for example, the sharpest 3-5 frames of 20 frames per second).

Herein, the frame editing module 221 divides the image signal of the outdoor unit 110 into each frame (for example, 20 frames per second), branching, bending, bending, and shading the shapes of the frames. Extracting a line, deleting a frame from which branching, bending, bending, and shading lines of the shape are extracted, and some of the frames in which the image is clearest among each of the undeleted frames (eg, 3 frames per second) And a frame editing algorithm configured to select and store -5 frames).

Therefore, since the frame number of the video signal is reduced by the frame editing module 221, the transmission capacity of the video signal to be transmitted to the wireless controller 300 through the Bluetooth unit 260 is reduced.

Here, the number of frames selected by the frame editing module 221 according to the transmission capacity of the video signal is calculated as follows.

For example, the maximum data transmission rate of the Bluetooth unit 260 calculated by the transmission rate calculation unit 270 is 723 kbps, of which the transmission speed of the audio signal is 64 kbps and the data transmission speed of the video signal is 550 kbps. In this case, in order to transmit a normal video signal at a transmission speed of 550 kbps, the transmission capacity per second of the video signal should be calculated.

Accordingly, the transmission capacity per second of the video signal is (550,000 / 8) * (1 second) = 68.8 kbytes according to the calculation of the transmission capacity of (video bit rate / 8 (converted to byte)) * playback time (second). Becomes

Accordingly, the number of frames per second of the video signal, for example, 3-5 frames per second is selected so that the transmission capacity per second of the video signal is 68.8 kbytes or less.

Therefore, the transmission of the video signal and the audio signal at a transmission rate of 614 kbps, which is the sum of the video signal transmission rate of 550 kbps and the audio signal transmission rate of 64 kbps, when the video signal and the audio signal are simultaneously transmitted using the Bluetooth unit 260. Or normal transmission is possible without loss.

Therefore, since the video signal displayed by the LCD 303 of the wireless controller 300 is composed of about 3-5 frames per second, for example, the motion of the video is not displayed continuously, i.e., smoothly. It is possible to prevent the occurrence of excessive traffic during transmission and there is no great difficulty in grasping the information (visitor information) of the video.

 4 is a diagram illustrating an operation of a change image detection module and a background image detection module of an image signal processor in the home network controller of FIG. 3.

On the other hand, the image signal processing unit 220, as shown in Figure 4, as shown above, the movement of the image (3-5 frames per second) selected and transmitted by the frame editing module 221 is not displayed smoothly continuously The video signal transmission rate calculation unit may be configured to enable normal data transmission even when excessive traffic is generated in the communication channel during data transmission (for example, when the current transmission rate is less than or equal to the minimum data transmission rate). The number of frames per second is increased to be higher than the number of frames selected by the frame editing module 221 (e.g., 6-10 per second) while having a smaller transmission capacity than the minimum transmission speed calculated by 270. Frame) further includes a change image detection module 222 and a background image detection module 223.

Here, the change image detection module 222, as shown in Figure 4, so that the video signal has a transmission capacity of a value smaller than the transmission capacity suitable for the lowest transmission rate calculated by the transmission rate calculation unit 270 Sequentially comparing the frames per second of the video signal and extracting only the change area by examining the entire area of the frame, preprocessing / binarizing step of preprocessing and binarizing the change area, and miscellaneous in the preprocessing and binarizing frame And a variable image detection algorithm configured to selectively store and store the changed image at a predetermined number of frames (for example, 6-10 frames per second) using region analysis.

Here, the number of frames per second (for example, 6-10 frames) of the change image detected by the change image detection algorithm depends on the calculation formula of the image signal transmission capacity in the frame editing module 221.

In addition, the background image detection module 223 includes a background image detection algorithm for detecting an unchanged region, that is, a background image, among the frames detected by the change image detection module 222 as one frame.

Therefore, the changed image detected by the change image detection module 222 is smaller in size than the original image signal frame and is calculated by the transmission capacity according to the lowest transmission speed, so the image selected by the frame editing module 221 is selected. Since the transmission capacity is smaller than the signal, the communication channel occupancy due to the transmission of the video signal can be reduced while having more frames than the number of frames selected by the frame editing module 221.

In addition, when the number of frames is increased, when the change image frame of the change image detection module 222 is turned on or overlaps with the background image frame detected by the background image detection module 223, as described above. The motion may be displayed more smoothly than the video signal selected and transmitted by the frame editing module 221.

The detection signal processor 230 processes the detection signal detected by the detection sensor 140 as an electrical signal, and outputs a corresponding alarm sound and an alarm message to the speaker 201 and the LCD 203, respectively, so that the user may correct the situation. Ensure that the identification is made.

The external input signal processing unit 240 has an infrared signal and a key matrix structure input by the corresponding remote controller 101 of the remote control apparatus 100 and includes a numeric key and various function keys for dialing. Processes the key input signal input by the electrical signal.

The control signal generator 250 analyzes and processes an infrared signal received by the external input signal processor 240 and an electrical signal corresponding to the key input signal, and analyzes and processes a data signal received from the wireless controller 300. Generates a control signal for controlling the remote control device 100.

The Bluetooth unit 260 is connected to the control unit 280 by HCI (Host Control Interface) to receive the HCI packet (voice signal, video signal, detection signal, etc.) and transmit it to the wireless controller 300, the wireless controller 300 ) Receives data corresponding to the HCI packet.

Here, the HCI may use a USB, standard PC interface including RS-232C, RS-485, and the HCI packet may be classified into a Command, Event, and Data packet.

In addition, the Bluetooth unit 260 employs a voice variable CVSD (Continuous Variable Slope Delta Modulation) so that data can be transmitted and received at high speed using a radio frequency (RF) without a physical cable in various electromagnetic periods. It is desirable to enable voice transmission as well as text data everywhere.

The transmission rate calculation unit 270 determines whether data currently being transmitted is occupied in the communication channel between the Bluetooth unit 260 and the wireless controller 300 when a data transmission request is generated between the Bluetooth unit 260 and the wireless controller 300. do. Thereafter, if there is data currently being transmitted in the communication channel, data transmission through the communication channel is performed through the transmission amount Tr of the data being transmitted, the initial transmission time St of the data being transmitted, and the current time Nt. Calculate the bit per rate (Bit per rate = (Tr / (Nt-St)), and if there is no data currently being transmitted on the communication channel, generate a random beacon signal and perform the communication as described above. Calculate the highest data rate over the channel (optimum data rate) and the lowest data rate.

In addition, the transmission rate calculation unit 270 preferably monitors the traffic state by comparing the transmission rate of the data currently being transmitted with the calculated lowest data transmission rate.

FIG. 5 is a block diagram illustrating a radio controller in the home network system of FIG. 1.

The wireless controller 300 includes an audio signal processor 310, an image signal processor 320, a detection signal processor 330, an external input signal processor 340, a Bluetooth 350, and a controller 360.

Here, the wireless controller 300 is preferably a remote controller (Remote Controller) of the handset type that can be easily carried with a built-in short-range wireless communication function.

The voice signal processing unit 310 modulates and demodulates the voice signal received from the Bluetooth unit 260 of the home network controller 200, outputs it through the speaker 301, and modulates and demodulates the voice signal received from the microphone 302. To make a voice call with the corresponding device of the remote control device (100).

The image signal processor 320 decodes / encodes the image signal received from the Bluetooth unit 260 of the home network controller 200 and displays the same through the LCD 303.

Here, when the video signal processed by the video signal processor 320 is an edited video having a reduced number of frames per second processed by the frame editing module 221 of the home network controller 200, the video signal processor 220, Although the motion of the image is not displayed continuously, i.e. smoothly, it is possible to prevent the occurrence of excessive traffic during transmission of the video signal and there is no great difficulty in grasping the information (visitor information) of the image.

On the other hand, the video signal processor 320, the home network controller 200 to compensate for the video signal processed by the frame editing module 221 of the video signal processor 220 is not smoothly displayed, the home network controller ( An image overlap module 321 for capturing or overlapping the change image transmitted from the change image detection module 222 of the image signal processor 220 to the background image frame transmitted from the background image detection module 223. ).

Therefore, by turning on or overlapping the change image frame of the change image detection module 222 to the background image frame detected by the background image detection module 223 by the image overlap module 321, as described above. The motion may be displayed more smoothly than the video signal selected and transmitted by the frame editing module 221.

The detection signal processing unit 330 processes the detection signal received from the Bluetooth unit 260 of the home network controller 200 as an electrical signal and outputs the corresponding alarm sound and alarm message to the speaker 301 and the LCD 303, respectively. So that the user can accurately grasp the situation.

The external input signal processor 340 has a key matrix structure and processes a key input signal input by a keypad 304 having a numeric key and various function keys for dialing as an electrical signal.

The Bluetooth unit 350 is connected to the control unit 360 by a host control interface (HCI) to transmit an HCI packet (voice signal, detection signal, external input signal, control signal, etc.) to the Bluetooth unit of the home network controller 200. 260, and receives data corresponding to the HCI packet from the home network controller 200.

Hereinafter, a home network method using Bluetooth according to a preferred embodiment of the present invention having the above configuration will be described in more detail.

6 is a control flowchart illustrating the operation of a home network system using Bluetooth according to a preferred embodiment of the present invention.

First, a method of transmitting a data signal from the home network controller 200 to the wireless controller 300 will be described.

As shown in FIG. 6, a Bluetooth function between the home network controller 200 and the wireless controller 300 is provided by the user from the keypad 204 of the home network controller 200 or the keypad 304 of the wireless controller 300. Is set (step 400).

Thereafter, a voice signal, a video signal, and a detection signal are received from the outdoor unit 110, the voice call device 120, and the detection sensor 140 of the remote controller 100 at the home network controller 200 (step 410). .

Then, the maximum data rate (optimum data rate) and the lowest data rate between the Bluetooth unit 260 of the home network controller 200 and the Bluetooth unit 350 of the wireless controller 300 by the transmission rate calculation unit 270. The data transmission rate is calculated (step 420).

Thereafter, the image signal is framed per second by the frame editing module 221 of the image signal processor 220 such that the image signal has a transmission capacity corresponding to the maximum transmission rate calculated by the transmission rate calculator 270. An edited image including some frames having the clearest underwater image (for example, the sharpest 3-5 frames of 20 frames per second) is stored (step 430).

Thereafter, the voice signal, the detection signal, and the video signal of some frames selected by the frame editing module 221 are transmitted to the Bluetooth unit 350 of the wireless controller 300 by the Bluetooth unit 260 (step 440).

Thereafter, the audio signal, the detection signal, and the video signal are processed by the voice signal processor 310, the image signal processor 320, and the detection signal processor 330 of the wireless controller 300 (450).

That is, the audio signal is modulated and demodulated by the audio signal processor 310 and output through the speaker 301, and the video signal is decoded / encoded by the video signal processor 320 and displayed on the LCD 303. .

After the step 440 or at the same time, whether excessive traffic occurs in the communication channel between the Bluetooth unit 260 of the home network controller 200 and the Bluetooth unit 350 of the wireless controller 300 by the transmission rate calculation unit 270. In step 460, it is determined whether or not a signal is input to compensate for the movement of the image which is selected by the frame editing module 221 and transmitted by the user and is not displayed smoothly.

In step 460, excessive traffic is not generated in the communication channel between the Bluetooth unit 260 of the home network controller 200 and the Bluetooth unit 350 of the wireless controller 300, or is transmitted to the frame editing module 221 by the user. If it is not determined whether an input of a signal for compensating that the motion of the image selected and transmitted is not continuously displayed is smoothly determined, the controller 280 proceeds to step 440.

If, in step 460, excessive traffic is generated in the communication channel between the Bluetooth unit 260 of the home network controller 200 and the Bluetooth unit 350 of the wireless controller 300 (for example, the current transmission rate is Input signal (for example, wireless controller 300) to compensate that the motion of an image selected and transmitted by the frame editing module 221 and transmitted by the user by the user is not displayed smoothly continuously. When a signal corresponding thereto is inputted from the keypad 304 of the control panel) and is transmitted to the home network controller 200), the changed image detection module 222 and the background image detection module of the image signal processor 220 are determined. 223 changes the image signal in the entire area of the frame such that the video signal has a transmission capacity smaller than the transmission capacity suitable for the lowest transmission speed calculated by the transmission rate calculation unit 270. In operation 470, a change image extracted only a picture area and a background image for capturing or overlapping the change image are detected.

Thereafter, the video signal, the audio signal, and other data separated into the change image and the background image by the Bluetooth unit 260 are transmitted to the Bluetooth unit 350 of the wireless controller 300 (step 480).

Thereafter, the change image frame is captured or overlapped on the background image frame and displayed by the image overlap module 321 of the image signal processor 320 of the wireless controller 300 (step 490).

Meanwhile, in order to control the remote controller 100, a data signal is transmitted from the wireless controller 300 to the home network controller 200, whereby the remote controller 100 is controlled by the home network controller 200. Since the process is the same as that between the conventional home network system and the radio controller, a description thereof will be omitted.

Therefore, as described above, according to the present invention, a call signal from the remote controller (for example, a call signal of an interphone by a visitor's visit) is wirelessly transmitted to the radio controller by Bluetooth means of the home network controller. A response signal (for example, a call for intercom call of the visitor) to the call signal and a control signal (for example, a control signal for opening and closing the front door) of the remote controller are used to control the wireless controller. By wireless transmission to the home network controller by Bluetooth means, it is possible to check the video of the external visitor and make a call through the wireless controller regardless of the place, and to remotely control home appliances such as a TV or an air conditioner. It can provide more convenience to the user.

In addition, before the video signal transmitted from the remote control device is transmitted from the home network controller to the radio controller, the transmission capacity of the video signal is calculated so that the transmission speed of the communication channel is calculated and corresponds to the transmission capacity suitable for the transmission speed. By controlling the A, it is possible to prevent excessive traffic from occurring in a communication channel when transmitting a large amount of video signals generated in real time.

In addition, the transmission capacity of the video signal is reduced so that the video signal transmitted from the home network controller to the wireless controller is transmitted without a traffic problem, thereby preventing the transmission delay or loss of the video signal, and thus the transmission error control scheme. Power loss due to error correction or data retransmission can be prevented.

In addition, if an excessive traffic problem occurs in the communication channel during transmission of the video signal, the transmission capacity of the video signal has a value smaller than the transmission capacity suitable for the calculated lowest transmission rate, thereby minimizing the occurrence of traffic problem in the communication channel. have.

Although the present invention has been described with respect to specific embodiments, various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

As described above, according to the present invention, by calculating the transmission rate of the Bluetooth communication channel and controlling the transmission capacity of the video signal so as to correspond thereto, excessive traffic is transmitted to the communication channel by the large-capacity video signal captured in real time. It can be prevented from occurring.

In addition, by preventing excessive traffic during data transmission and reception using the Bluetooth communication channel, it is possible to prevent the transmission delay or loss of data, thereby reducing the power loss according to the transmission error control scheme.

Claims (12)

A remote control device, a home network controller and a wireless network controller capable of mutually communicating with the home network controller connected to the remote control device for data communication, the home network controller, the radio controller using the radio frequency (RF) Bluetooth unit for enabling data communication, the transmission amount (Tr) of the data currently being transmitted on the communication channel between the Bluetooth unit and the wireless controller, the initial transmission time (St) and the current time (Nt) of the data being transmitted A transmission rate calculating unit for calculating a maximum or lowest data transmission rate through the communication channel (Bit per rate: Bit per rate = (Tr / (Nt-St)) and a transmission capacity suitable for the calculated data transmission rate. Home network using Bluetooth including a video signal processing unit for controlling the transmission capacity of the video signal transmitted from the remote control device to have In the system, The video signal processor may include a frame editing module configured to store an edited video including some frames having the sharpest image among frames per second of the video signal so that the video signal has a transmission capacity suitable for the highest or lowest transmission speed. Home network system using Bluetooth, characterized in that it comprises. The video signal processor of claim 1, wherein the video signal processor sequentially compares frames per second of the video signal with each other so that the video signal has a transmission capacity smaller than a transmission capacity suitable for the lowest transmission speed, and compares the entire area of the frame. The home network system using Bluetooth, characterized in that it further comprises a change image detection module for storing the change image extracted from the change region only by a predetermined number of frames. The apparatus of claim 2, wherein the image signal processor further comprises a background image detection module configured to store an unchanged area among the frames detected by the change image detection module as a background image of one frame. Home network system using. The home network system using Bluetooth according to claim 2, wherein the number of frames is determined according to a calculation formula for transmission capacity per second of the video signal. The method of claim 3, wherein the radio controller, A Bluetooth unit for enabling data communication with the home network controller using a radio frequency (RF); And a video signal processor for processing and displaying a video signal transmitted from a home network controller through the Bluetooth unit. The image signal processor, And an image overlap module for capturing or overlapping the change image transmitted from the change image detection module to a background image frame transmitted from the background image detection module. The first step in which the highest or lowest data transmission rate for the communication channel between the Bluetooth unit of the home network controller and the Bluetooth unit of the wireless controller is calculated by the home network controller, is transmitted from the remote control device by the image signal processing unit of the home network controller. A second step of adjusting the transmission capacity of the video signal to be smaller than the transmission capacity suitable for the calculated maximum or minimum data transmission rate, by the Bluetooth unit of the home network controller, the video signal is a Bluetooth unit of the wireless controller In the third step of transmission, the video signal is processed and displayed by the image processing unit of the radio controller and the data transmission rate of the video signal being transmitted by the transmission rate calculation unit of the home network controller simultaneously with the third step. And the lowest data rate calculated by the rate calculator In the home network, a method using Bluetooth to a fifth step in which T, In step 5, if the data transmission speed of the video signal being transmitted is lower than the minimum data transmission speed, the change image obtained by extracting only the change region of the frames per second of the video signal by the image signal processor of the home network controller is fixed. And a sixth step of storing the changed image as the number of frames. 7. The method of claim 6, further comprising a seventh step of extracting an unchanged region of frames per second of the video signal after the sixth step and storing it as a background image of one frame. Home network method used. The home network method using Bluetooth according to claim 7, wherein the change image is captured or overlapped with the background image by the wireless controller. delete delete delete delete

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